These are the telephone area codes for Baltimore and the surrounding Central Maryland region.
How to Call Baltimore from Overseas
- Dial your country's exit code (International Access Code)
- Dial 1 (USA country code)
- Dial the area code (410, 443, or 667)
- Dial the 7-digit local phone number
Example: Calling Downtown Baltimore from the UK
00 1 410 555 8765
Where:
00 = UK exit code
1 = USA country code
410 = Baltimore metro area code
555 8765 = Local Baltimore phone number
Quick Facts
Baltimore Area Code Coverage
These area codes serve Baltimore City, Baltimore County, and nearby Central Maryland communities:
410 - Baltimore Core
Original area code for Baltimore and much of Central/Eastern Maryland
443 - Overlay for 410
Introduced in 1997 to meet growing demand; covers the same region as 410
667 - Second Overlay
Added in 2012 as an additional overlay for the 410/443 numbering plan area
202 - Washington DC
DC metro area (borders southern Maryland)
240 / 301
Western & Southern Maryland (e.g., Rockville, Frederick, Waldorf)
484 / 610
Eastern Pennsylvania (e.g., Philadelphia suburbs near MD border)
Major US Area Codes
Common Exit Codes for Calling USA
When calling Baltimore from these countries, use these exit codes:
United Kingdom
00
Australia
0011
European Union
00
Japan
010
China
00
Canada
011